What is the main purpose of using pulsed electric field technology in the food processing industry?
Pulsed electric field (PEF) technology is a non-thermal food preservation method that involves the use of short electricity pulses for microbial inactivation while imposing minimal detrimental influence on food quality. This technology has the major advantage to provide high-quality foods to the consumers.
What is used for food processing by pulsed electric field?
Pulsed electric field (PEF) processing is an efficient non-thermal food processing technique using short, high voltage pulses. These pulses induce poration of plant, animal and microbial cells, leading to cell disintegration and microbial inactivation.
What is pulsed light in food processing?
Pulsed light (PL) is an emerging nonthermal technology for decontamination of food surfaces and food packages, consisting of short time high-peak pulses of broad spectrum white light. It is considered an alternative to continuous ultraviolet light treatments for solid and liquid foods.
Which of the following is correct for pulsed electric field?
Which of the following holds true for Pulsed Electric field? Explanation: All the statements pertaining to Pulsed Electric field are true. 5. Statement 1: In Pulsed Electric field, food is kept between two electrodes and electricity is passed to deactivate microbes.
Why is the pulsing such an important food processing technique?
For food quality attributes, PEF technology is considered superior to traditional thermal processing methods because it avoids or greatly reduces detrimental changes in the sensory and physical properties of foods. PEF technology aims to offer consumers high-quality foods.
What is the principle of pulsed electric field?
The basic principle of the PEF technology is the application of short pulses of high electric fields with duration of micro to milliseconds and intensity in the order of 10-80 kV/cm. The processing time is calculated by multiplying the number of pulses times with effective pulse duration.
What is oscillating magnetic field in food processing?
Oscillating magnetic field (OMF): Method used for preservation and sterilization of food in which pulses are applied to the food in the form of decaying or constant amplitude sinusoidal waves.
Which light is used for food preservation?
Short-wave ultraviolet light is reported to be an eﬀective method for inactivating bacteria that contaminate water and the surfaces of several materials.
What type of light is IPL?
23 What is intense pulsed light? Intense pulsed light (IPL) differs from laser light in that it is a polychromatic, noncoherent light covering a broad spectrum from 510 to 1200 nm. It is used in the treatment of sun damage, telangiectasias, and rosacea and in hair reduction.
Which of the following is are the critical factor S in pulsed electrical field PEF food processing technique?
The most important factors in the PEF system are the electric field intensity, number of pulses, pulse waveform, pulse width, treatment time and treatment temperature. But enzymes and proteins are generally more resistant to electric field intensity and pulses than microorganisms.
Which of the following microbes are more resistant to the effect of pulsed electric field?
In general, Gram-positive bacteria and yeasts are more resistant to electric fields than Gram-negative bacteria.
How is a pulsed electric field used in food processing?
Pulsed electric field (PEF), or high-intensity pulsed electric field, processing involves the application of pulses of high voltage (typically 20–80 kV/cm) to foods placed between two electrodes.
How are pulsed electric fields used in pasteurisation?
Pulsed Electric Fields. Pulsed electric fields (PEF) is a promising technology that enables pasteurisation of liquid products, as it permits the inactivation of several log-cycles of microbial vegetative cells present in foods.
What foods can be treated with pulsed electric field?
The administration of PEF is also influenced by nature of product as a vast range of products are being treated by PEF which include fruit juices, liquid eggs, milk and dry herbs.
How is energy stored in a pulsed field?
Pulsed electric field (PEF) processing involves the application of high voltage pulses for a few microseconds to food placed or flowing between two electrodes. The concept of PEF is relatively simple. Electric energy at a low power level is collected over an extended period and stored in a capacitor.